The wpForo has a "Mark all read" feature available. According to the related content, there should be a "Mark all read" link located at the bottom of the main forum index page. When users click this link, it will mark all posts across all categories and sub-forums as read in one action—exactly what you're looking for.

Here's how to guide your users to use this feature:

1. Have users navigate to the main forum index/homepage
2. Scroll to the bottom of the page
3. Look for and click the "Mark all read" link
4. This will instantly mark all unread posts as read across all categories and sub-forums

If your users aren't seeing this link at the bottom of the forum index, you may want to check your wpForo settings to ensure the feature is enabled. It's also worth noting that there's a separate admin function if you need to mark all posts as read for all users across the entire forum—though that's a different use case than what you're describing.

I would like to know if there is a way for a user to mark all new/unread posts in the forum as read at once.

Currently, users can mark individual topics/posts as read, but I would like to have an option such as “Mark all as read”, so that all currently unread content is marked as read with one click.

Is this feature available in wpForo? If so, where can I enable it?

If there is no built-in option, is there a recommended way to add this functionality?

Thank you!